Ah, well, a medical need popped up (finally - and it's good to know what's going on.) I'll give myself a couple of weeks then I'll be doing the alternate day fasting, but making a point of kicking out more of the processed flour I've added back into my diet over a couple of years since the PMR cleared up. It turns out the thyroid was running low and it'll be another week at least before I begin to feel the effects of the daily tablet on an empty stomach. Then perhaps the extra weight gained over the winter will subside. I'm not doing keto but the doctor wants fewer carbs and fats and more protein.